Very well balanced. With 8 hours of use per day I am satisfied. It is sturdy in movement. I have it connected via bluetooth to a laptop and a mobile phone.

It doesn't lose connection, responds just fine, feels good in the hand, very easy to switch between 2 computers.

Super mouse! I use it for many devices (computers, tablets, phones), and connecting and switching between them is very easy. Also, it is not very big (like the Logitech MX Master 3S or the Logitech MX Master 4) and it fits nicely in the hand!

The mouse ended up like this after being used every day without any care for 5 consecutive rough years. So for 44 euros, it's not just worth it, but I would say it suited me better than more expensive models. Its plastics are soft and maybe scratch more easily, but again, as I said, I never took care of it. The battery lasts, maybe just a bit less. What broke, and I bought it again because it generally suited me, was the receiver. It stopped responding. It also has Bluetooth but it was slower and didn't have the same feel. So if you want something that simply doesn't break and is a workhorse, get it.

It is the only one that allows you to work with up to 3 computers without having to look for the button to switch computers.

After 6.5 years (since 25/11/18) of continuous daily use, a problem appeared with the left microswitch and it started double-clicking. I didn't have time to replace the microswitch so I bought the same one again.

No deterioration of the plastics after so many years, to the point that when I bought the new one and had them side by side on the pad, I struggled to find which was the old and which was the new one.

I don't know exactly how long the battery lasts because after months when I change it, I forget when I installed it. I note that its switch has never been turned off!

Initially, when I got the new one, I connected it via Bluetooth, but I found that with the Unifying receiver I had been using for so many years, it behaves much better, doesn't delay at all when "waking up," and unlike the Bluetooth connection, it also works in the BIOS environment.

I highly recommend it.

Very practical mouse. I find it very convenient that it has the computer switch on the top and I don't need to turn it upside down.

when in free wheel the roller turns without the user turning it. very annoying. it switches between devices smoothly so it's practical.

This is the second time I am buying the same one. The first one lasted 4 years with my autistic son tearing it apart with his teeth.

I've had the mouse for 4 years, it's incredibly good and ergonomic. I believe it will easily last another four.

I bought it pretty much when it got out.
I use it for coding as part of my professional gear so as one might imagine it gets quite the abuse.
Yet, it is quite durable, no sign of wear or tear, I use rechargable batteries with it, I don't bother switching it off when I am done with it and if the battery is almost depleted I get a notice on the monitor from the software and I change it.
I find nothing bad about it, so, from my end ,it is highly recommended.

Okay, the mouse is quite good. Sturdy construction, minimal creaking. Many buttons that cater to an average to demanding user. The hidden button is very interesting and useful. The middle click of the scroll wheel is there (something I always look for in my mouse). Hassle-free connection for me.

A major drawback is its weight. Particularly heavy and takes time to get used to, especially if you are coming from a lightweight mouse. 4 stars for this, maybe even 3.5 if you have small hands and/or want it only for very basic use.

From a functionality standpoint, I don't see any issues. It is also very ergonomic in the hand. I see 2 issues: the price and the noisy buttons (-1).

I got it as a replacement for the M705. It is the same in quality and feel, but with upgrades that were indeed necessary.

Now it works with Bluetooth and not just with the Logitech Unifying Receiver.
It can also connect to 3 devices via Bluetooth.
Finally, it requires one AA battery instead of 2 like the M705 did.

Purchased 1.5 months ago.
Very good connectivity on multiple devices.
The coating still looks fine.

I would like it to be a bit bulkier, but without that being annoying.

I have been using it for a month, it connects easily to different devices, very convenient in hand, the materials are of high quality, it is worth the money!

Purchased in 2020. Excellent signal with no disconnects from the receiver, even with the interference of a wooden desk. It can also connect via Bluetooth to devices that have it (e.g. MacBook) without occupying a USB port. The rubber wears off in the shape of the hand, but it doesn't bother me. Accurate handling due to the right weight and size. I have relatively large fingers.

An excellent mouse that only gets 3 stars...
It has many positives:
- easy switching between 3 devices
- battery life
- this awesome scroll wheel with two modes...
- ergonomic and comfortable
- it is repairable (I changed the middle button on all three I have)
The reasons it loses two stars are:
- the rubber wears out (unacceptable for a €55 mouse)
- the buttons break, especially the middle one (unacceptable for a €55 mouse)
- I would prefer it slightly larger
- it should cost €35

Positives:
- Connection with three devices
- Convenient device switching with a button on the side
- Option for silent multi-page scroll or by step
Negatives:
- The soft coating of the mouse deteriorated after 2 years, as well as the contact of the left click, resulting in the inability to drag and drop, essentially rendering the mouse useless

Purchased on 27/07/23. Nice mouse, comfortable to hold, with a good size for regular hands (palm grip). Works fine on Linux (Fedora), and with the Solaar software (https://pwr-solaar.github.io/Solaar/), which is the equivalent of Logi Options+ for Linux, it can be customized to a great extent. The free-scrolling of the wheel is excellent, and the thumb button also functions as a gesture button. The only issue might be that the wheel has some play left-right, although it currently works fine.

Amazing mouse. I have had it for 5 years and it still hasn't had any issues. The battery, I forget to change it. Convenient size and weight, precision and comfort. A bit noisy but at normal levels. A big positive is the three Bluetooth connections, it connects with a laptop, iPad, and even an iPhone! Recommended!

I bought it 4 years ago. On the positive side, the battery still hasn't run out. But what's the point when it has such excessive energy saving that it permanently goes into sleep mode and is slow to wake up. It lags quite often. It disconnects. Often it takes 20-30 seconds to wake up. I've searched the internet to see if there's any setting, but there's no solution. Disabling the "Allow the computer to turn off this device to save power" setting in Device Manager doesn't change anything.

TLDR STAY AWAY!

Update 18-02-2026:
After 5 years, the left-click switch broke.

For me as a programmer, the best. It is the 2nd one. The 1st one, after years of daily and long hours of use, couldn't catch the left click of the scroll wheel that I had for copy. I got the MX MASTER 2S, which didn't satisfy me functionally, so I bought the 2nd TRIATHLON. I highly recommend it.

It does what it says. Very convenient, works perfectly on iPhone and computer for anyone who wants to screen share their mobile screen on the computer.

Positives:
- Connection with three devices
- Very convenient device switching with a button on the side

Negatives:
- The soft coating of the mouse wears off after a few months (especially if you have sweaty hands)
- Issues with the switches (specifically, the left click contact broke for me, resulting in not being able to drag and drop)

I have it for almost a year and I am very satisfied with my purchase. I have changed the battery twice (and this was with the first battery I used to be already old...) so no problem! It has a very comfortable and firm grip in the palm as I like it (medium hand size).

If something bothers me, it is that the buttons make a relatively loud click at night and it may be annoying.

The only annoying thing is that the side part where you place your thumb is a button that activates desktop items preview and it can be accidentally pressed during gaming. However, it can be disabled through the device's settings.